Scott.—The Structure of Mesoxylon multirame. 
457 
PLATE XIII. 
Drawings. Figs. 16, 17, and 22 by Mr. G. T. Gwilliam; Figs. 18-20 by Miss G. C. 
Harrison ; Fig. 21 by Mr. J. Allen. 
Type. 
Fig. 16. Somewhat diagrammatic transverse section of the stem. 3-16, leaf-traces, or (12-16) 
their axillary steles, numbered from within outwards. In trace 13 the subtending bundles are seen. 
?, a doubtful auxiliary stele. Traces 1 and 2 had already disappeared at this level and trace 15 is 
lost, x 4. S. 2334. 
Fig. 17. Radial section, c. cortex with leaf-trace; x. wood; p. discoid pith. x 3. S. 2359 
(probably from another fragment of the type-specimen). 
Fig. 18. Leaf-trace bundle in cortex (one of eight in trace 7). px . protoxylem ; x. centripetal, 
X2. centrifugal xylem ; ph. phloem, x 165. S. 2331. 
Fig. 19. Double leaf-trace (No. 12) at border of pith. px. protoxylem ; x. centripetal, X2. 
centrifugal xylem; m.r . medullary ray. x about no. S. 2339. 
Fig. 20. Leaf-trace cut lower down in its course, px. protoxylem, here endarch; X2. secon¬ 
dary wood; m.r. medullary ray. x about no. S. 2339. 
Fig. 21. Axillary stele in the cortex of stem. x. centripetal (?) wood; X2. secondary wood; 
ph. phloem. The lower side is towards the axis, x about 60. S. 2339. 
Fig. 22. Axillary shoot (No. 16) transverse, with the adjacent cortex of the stem. This is the 
uppermost shoot shown in Fig. 2. d.c. Dictyoxylon cortex of stem; st. stele of shoot, x 17. 
S. 2335. 
PLATE XIV. 
Drawings by Mr. G. T. Gwilliam. 
Second Specimen. 
Fig. 23. Small axillary stele in pericycle of stem ; the wood extends to the centre, ph. phloem. 
The lower side is towards the axis, x about 90. S. 2765. 
Fig. 24. Tangential section of wood, showing medullary rays and tangential pitting, t.p. two 
tracheides with one or more rows of pits on their tangential walls, x 200. S. 2774. 
Fig. 25. Radial section of wood, showing pitted tracheides, medullary rays, and xylem- 
parenchyma. x.p. xylem-parenchyma, the cells in 1-2 rows. m.r. medullary ray, showing pitting 
on the radial cell-walls, x about 100. S, 2780. 
